docs: def extract_tree_without(self, labels, suppress_unifurcations=True):
          '''Extract a copy of this ``Tree`` without the leaves labeled by the strings in ``labels``
  
          Args:
              ``labels`` (``set``): Set of leaf labels to exclude
  
              ``suppress_unifurcations`` (``bool``): ``True`` to suppress unifurcations, otherwise ``False``
  
          Returns:
              ``Tree``: Copy of this ``Tree``, exluding the leaves labeled by the strings in ``labels``
          '''
          return self.extract_tree(labels, True, suppress_unifurcations)